The comparisons are exactly the same dude!
iPhone 5S has 16GB for $650 and 32GB for $750.
iPhone 6 has 16GB for $650 and 64GB for $750.
This means from someone who always buys the $650 iPhone, they now get 48GB less than the middle tier instead of only 16GB less. This is a WORSE deal for the consumer.
What I am saying, and you actually agreed to, is that technically the $650 buyer is getting the same capacity as the year before. No one actually complains that they have 48GB less storage now. Just like with a base model jump to 32GB, a $750 iPhone buyer still gets the same 64GB of storage!
You seem to think that consumers subtract the base model from the next model up, factor in a price per GB ratio, and then determine if it's a good deal. No. One. Does. This. In fact it would greatly simplify everything. A 32GB iPhone starts at $650, then for $100 more you can get double the storage, either 64GB or 128GB. Do you hear people complain that it's a $100 difference for 48GB versus a $100 difference for 64GB of the top model? No!
I hear many people do a cost analysis like how I stated.
They look at the base model and then figure out what they get in ADDITION to the base model by paying the $100 premium. I hear it all the time. All the time!
Best Buy: So here is the new iPhone it starts at $650 for 32GB. We also have a $750 and $850 tier.
Rick: So what do I get if I pay the extra $100?
Best Buy: You get 64GB instead of 32GB.
Rick: So i get 32GB of additional memory for $100?
Best Buy: Yes
Rick: Hmm. Last year I got 48GB for $100.
You hear it all the time!!! People also use incremental value in making buying decisions. They always ask what will $100 give me? What will the additional $200 give me.
I know this is an extreme example but it makes my point about incremental value:
iPhone 7 - 60GB - $650
iPhone 7 - 64GB - $750
You don't think the guy who buys the 64GB model will feel ripped off? He will because he's only getting 4GB more for $100. People will always compare the 3 models to see which one not only fits their lifestyle but also is the best deal. Saying that a 64GB buyer will be happy to pay the same price for a 64GB phone regardless of what the lower tier is getting is being ignorant of real buying behavior.